Usually I use View posts since last visit
link to see what's new since last visit. This is (probably) related to You last visited on...
But after a while of browsing the forum (usually if I'm away from computer, but browser stays open) this last visit date is set to current datetime. And all topics are marked as not new.
How can be this disabled/changed. I believe it is related to web session. Is it idle for to long ? What is the idle time ? Can this idle time be longer ? Or even unlimited - session is ended when browser is closed ?